<html>

<head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title>haha</title>
</head>

<body>
    <!-- 开发环境版本，包含了有帮助的命令行警告 -->
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>

    <!-- 生产环境版本，优化了尺寸和速度 -->
    <!-- <script src="https://cdn.jsdelivr.net/npm/vue"></script> -->

    <div id="app">
        {{message}}
    </div>
    <script>
        var app = new Vue({
            el: "#app",
            data: {
                message:"Hello World"
            }
        })
    </script>
</body>

</html>